---
title: "Hydraulic quick-connect couplings"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:HYDRAULIC_QUICK_CONNECT_COUPLINGS"
  data_integrity_hash: "6bd258ea65f97da9648abd48fd78e531"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:HYDRAULIC_QUICK_CONNECT_COUPLINGS"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hydraulic-quick-connect-couplings.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/hydraulic-quick-connect-couplings"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-350 bar at -40°C to 120°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 420
    unit: "bar"
    consequence: "Plastic deformation of coupling body due to hoop stress exceeding yield strength (σ_θ = P·r/t &gt; σ_y), where P=pressure, r=inner radius, t=wall thickness"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contaminant ingress (particles &gt;25 μm ISO 4406 18/16/13)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral 40 μm sintered bronze filter with 0.8 mm^2 total filtration area"
  - node_2:
      trigger: "Pressure surge exceeding 1.5× rated pressure for &gt;100 ms"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Poppet valve with 5 ms response time and 0.35 L/min bypass flow"
bom_nodes:
  locking-sleeve:
    type: "component"
    urn: "URN:CNFX:ME:LOCKING_SLEEVE"
    interface_type: "physical-logic-coupled"
  seal:
    type: "component"
    urn: "URN:CNFX:ME:SEAL"
    interface_type: "physical-logic-coupled"
  body:
    type: "component"
    urn: "URN:CNFX:ME:BODY"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hydraulic-quick-connect-couplings.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "f5041b62d95f1caf864927dac730aab47ced9380df872fea5db7ba6c5591e4a9"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Hydraulic quick-connect couplings

## 1. Technical Definition
Hydraulic fittings that enable rapid connection and disconnection of fluid lines without tools.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-350 bar at -40°C to 120°C**. Failure boundary: **Material yield strength exceeded at 420 bar for steel alloys (e.g., AISI 316L with 205 MPa yield) or seal extrusion at 380 bar for HNBR seals**, Mechanism: **Plastic deformation of coupling body due to hoop stress exceeding yield strength (σ_θ = P·r/t &gt; σ_y), where P=pressure, r=inner radius, t=wall thickness**.

### 2.1 Analytical Physics Model
Governed by the **Darcy-Weisbach Pressure Drop**:

> **Primary Equation**: $\Delta P = f \cdot \frac{L}{D} \cdot \frac{\rho v^2}{2}$  
> **Engineering Impact**: Critical for sizing CIP (Clean-In-Place) pump heads.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| f | Friction Factor | Engineering Constant |
| L | Pipe Length | Engineering Constant |
| v | Velocity | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contaminant ingress (particles &gt;25 μm ISO 4406 18/16/13) | 8 | Seal abrasion leading to 0.1 mL/min leakage at 210 bar | Integral 40 μm sintered bronze filter with 0.8 mm^2 total filtration area |
| Pressure surge exceeding 1.5× rated pressure for &gt;100 ms | 8 | Locking mechanism fatigue fracture at 10^5 cycles (S-N curve for 34CrMo4 steel) | Poppet valve with 5 ms response time and 0.35 L/min bypass flow |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **Hydraulic Fluid Filtration System**, **Pressure Testing Equipment**  
**Downstream Applications**: Construction Equipment, Agricultural Machinery, Industrial Presses  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are available for hydraulic quick-connect couplings?
**A**: Our hydraulic quick-connect couplings are available in stainless steel for corrosion resistance, carbon steel for high strength, and brass for general-purpose applications.

### Q: How do quick-connect couplings work without tools?
**A**: Quick-connect couplings feature a push-to-connect design with a locking sleeve mechanism that securely seals fluid lines when engaged and allows instant disconnection when released.

### Q: What are the main components of a hydraulic quick-connect coupling?
**A**: Each coupling consists of three primary components: the body (main housing), locking sleeve (connection mechanism), and seal (fluid-tight gasket or O-ring).

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Hydraulic quick-connect couplings](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/hydraulic-quick-connect-couplings)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: HYDRAULIC_QUICK_CONNECT_COUPLINGS | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 5a1fa7af
